ANTI-LOCK BRAKE CONTROL DEVICE AND ANTI-LOCK BRAKE SYSTEM HAVING THE ANTI-LOCK BRAKE CONTROL DEVICE

摘要

In an anti-lock brake system of a brake system including an interlocking brake device, the present invention reduces at a low cost the discomfort in brake manipulation feeling of a driver which is generated attributed to braking which exceeds the brake manipulation feeling at the time of operating the interlocking brake device. A cylinder pressure (symbol CB) of a second front wheel cylinder 136 is controlled such that speed difference between a vehicle body speed (symbol ST) and a vehicle wheel speed (symbol F) of a front wheel 131 becomes equal to or less than a fixed speed difference due to an open/close control of a holding valve 24 and an open-close control of a pressure reducing valve 25. With respect to a cylinder pressure (symbol RW) of a rear wheel cylinder 234, since an open control and a close control of a holding valve 21 are repeatedly performed (symbol EV) at a predetermined cycle, a sharp pressure increase of a brake working liquid pressure (symbol RM) in a rear master cylinder 204 is gradually pressurized in a distributed manner at a predetermined cycle.